macula degeneration

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The version with watermark is for free to embed. What leads to a macular degeneration? A cross section of the eye. The inner layer is the retina with the spot of sharpest vision. An enlarged view of the retina tissue. From receptor cells nerve impulses emanate. They are led horizontally to the optic nerve and further to the brain. In the deep layer at the bottom we can see the large vessels of the choroid membrane. They release nutrients across a single layer of pigment epithelium cells into the retina.
Now the retina detaches together with the pigment layer. This is called a "wet" form of macular degeneration. Blood vessels may grow up as well which may lead to excrescences and bleeding.